Homologous and Analogous Structures

Front

What does the term 'fitness' refer to in biology?

Back

Fitness refers to an organism's ability to survive and reproduce in its environment.

Front

Why are mutations important in evolution?

Back

Mutations are important because they bring about genetic variation needed for a population to evolve.

Front

Do analogous structures show common ancestry?

Back

False, analogous structures do not show common ancestry.

Front

What are analogous structures?

Back

Analogous structures are those that evolved from different ancestors but have similar functions due to living in similar environments.

Front

What is an example of an analogous structure?

Back

The wings of bats and the wings of insects are examples of analogous structures.

Front

What are homologous structures?

Back

Homologous structures are those that share a common ancestry, even if they have different functions.

Front

Can you give an example of homologous structures?

Back

The forelimbs of humans, whales, and bats are examples of homologous structures.

Front

What is the difference between homologous and analogous structures?

Back

Homologous structures arise from a common ancestor, while analogous structures arise from different ancestors but serve similar functions.

Front

What is structural adaptation?

Back

Structural adaptation refers to physical features of an organism that enhance its survival.

Front

What is functional adaptation?

Back

Functional adaptation refers to the ways in which an organism's internal processes help it survive.